Chinese shrub closely related to Siberian ginseng. In China the root is used to treat autoimmune diseases and cancer. It is often used to treat rheumatism and rheumatoid arthritis, as well as weakness in the joints and muscles, difficult urination, edema, and cold dampness pain. It has anti-inflammatory effects and is used to treat swelling. There is strong evidence that it has direct immunomodulating effects by controlling the cytokines that mediate immune response. A study on mice showed that it can protect the liver by suppressing inflammatory responses. The thorny but otherwise attractive shrub prefers well-drained soil and full sun, but it will grow in partial shade. It can reach 2-3m (6-10ft) in height.